<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<body>
<script>
// A cross-origin response containing JavaScript, labelled as text/csv.
const probeUrl = get_host_info().HTTPS_REMOTE_ORIGIN +
    "/fetch/corb/resources/response_block_probe.js";

// Test handling of blocked responses in CORB/ORB for <script> elements.
function probe_script() {
  // We will cross-origin load a script resource that should get blocked by all
  // versions of CORB/ORB. Two things may happen:
  //
  // 1, An empty response is injected. (What CORB does.)
  // 2, An error is injected and script loading aborts. (What ORB does.)

  // Load the probe as a script.
  const script = document.createElement("script");
  script.src = probeUrl;
  document.body.appendChild(script);

  // Return a promise that will return a string description corresponding to the
  // conditions above.
  return new Promise((resolve, reject) => {
    script.onload = _ => resolve("Resource loaded (expected for CORB)");
    script.onerror = _ => resolve("ORB-style network error");
  });
}

// Test handling of blocked responses in CORB/ORB for script-initiated fetches.
function probe_fetch() {
  return fetch(probeUrl, {mode: "no-cors"})
    .then(response => response.text())
    .then(text => {
        assert_equals(text, "");
        return "Resource loaded (expected for CORB)";
    })
    .catch(_ => "ORB-style network error");
}

// These tests check for ORB behaviour.
promise_test(t => probe_script().then(
    value => assert_equals(value, "ORB-style network error")),
    "ORB: Expect error response from <script> fetch.");
promise_test(t => probe_fetch().then(
    value => assert_equals(value, "ORB-style network error")),
    "ORB: Expect error response from fetch().");
</script>
